The graph represents the relationship between the number of rocks a child collects, r, over a number of weeks, w. Which function can be used to determine the number of rocks, r, a child will collect after w weeks?

r=115w+5

r = 5w + 15

r=15w+15

r = 15w + 5

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation,and the determine the cost if he drove it70 miles.b) what would be the cost of a car rental if the car was driven 250 miles? show work